package com.ikun.lease.web.admin.service.impl;

import com.ikun.lease.common.minio.Minioproperties;
import com.ikun.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    private MinioClient minioClient;
    @Autowired
    private Minioproperties properties;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

            boolean b = minioClient.bucketExists(BucketExistsArgs
                    .builder()
                    .bucket(properties.getBucketName())
                    .build());//判断桶是否存在
            if (!b) {//不存在就创建
                minioClient.makeBucket(MakeBucketArgs
                        .builder()
                        .bucket(properties.getBucketName())
                        .build());
                minioClient.setBucketPolicy(SetBucketPolicyArgs
                        .builder()
                        .bucket(properties.getBucketName())
                        .config(createBucketPolicyConfig(properties.getBucketName()))
                        .build());//设置访问策略
            }
            String filename = new SimpleDateFormat("yyyyMMdd").format(new Date())
                    + "/"
                    + UUID.randomUUID() + "-"
                    + file.getOriginalFilename();//生成文件唯一URL
            minioClient.putObject(PutObjectArgs
                    .builder()
                    .bucket(properties.getBucketName())
                    .object(filename)
                    .stream(file.getInputStream(), file.getSize(), -1)
                    .contentType(file.getContentType())
                    .build());//将文件传入Minio对应桶中
            return String.join("/",properties.getEndpoint(),properties.getBucketName(),filename);//返回URL
    }

    private String createBucketPolicyConfig(String bucketName) {

        return """
                {
                  "Statement" : [ {
                    "Action" : "s3:GetObject",
                    "Effect" : "Allow",
                    "Principal" : "*",
                    "Resource" : "arn:aws:s3:::%s/*"
                  } ],
                  "Version" : "2012-10-17"
                }
                """.formatted(bucketName);
    }
}
